Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period	$ (226,168)
Current period other comprehensive loss	3,415	(151)
Reclassification of unrealized loss on available-for-sale investments, net of tax	2,362
Balance at end of period	(222,753)
Unrealized gain on available-for-sale investments, net of tax	1,710
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period	(226,168)
Current period other comprehensive loss	1,053
Reclassification of unrealized loss on available-for-sale investments, net of tax	2,362
Balance at end of period	(222,753)
Unrealized gain on available-for-sale investments, net of tax	1,710
Unrealized Gain (Loss) On Available-For-Sale Securities [Member]
Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period	(4,072)
Current period other comprehensive loss	1,710
Reclassification of unrealized loss on available-for-sale investments, net of tax	2,362
Balance at end of period	0
Cumulative Translation Adjustment [Member]
Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period	2,481
Current period other comprehensive loss	(657)
Balance at end of period	1,824
Change In Net Pension And Other Benefit Obligations [Member]
Accumulated Comprehensive Income [Roll Forward]
Balance at beginning of period	(224,577)
Current period other comprehensive loss	0
Balance at end of period	(224,577)
ModusLink [Member] | Unrealized Gain (Loss) On Available-For-Sale Securities [Member]
Accumulated Comprehensive Income [Roll Forward]
Unrealized gain on available-for-sale investments, net of tax	$ (2,400)